Cement sole-attaching machine



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' CEMENT SOLE ATTACHING MACHINE Filed Dad. 7, 1932 4 Sheets-Sheet 1 May14,1935. w. D THOM AS 2,001,002

CEMENT SOLE ATTACHING MACHINE a Filed Dec. 7, 19:52 4 Sheets-Sheet 2Tig". 2.

May 1935. w. D. THOMAS 2,l,@2

CEMENT SOLE ATTACHING MACHINE I Filed Dec. 7, 1932 4 Sheets-Sheet 3 m180 m9 924 we Z EU/K g 45 W 122 a I A May 14, 1935. w. D. THQMAS CEMENT.SQLE ATTACHING MACHINE Filed Dec. 7, 1932 S heets-sheet- 4.

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Patented May 14, 1935 UNITED STATES PATENT OFFICE CEMENT SOLE-ATTACHINGMACHINE ,William D. Thomas, Lynnfield, Mass, assignor to United Shoe,Machinery Corporation, Paterson, N. La corporation of New JerseyApplication December 7, 1932, Serial No. 646,156 39 Claims. (o 12-33) 5shown and described in Letters Patent of the United States No.1,897,105, granted February 14, 1933, on the application of MiltonH.Ballard. It is to be understood, however, that in some .of its novel anduseful aspects the present invention is not limited to machines of thatparticular type.

Machines for cement-attaching soles to shoes of the type disclosed inthe above-mentioned patent are provided with pressure-applying meanscomprisinga pair of levers for engaging plungers carried by a presserunit or pad box mounted. on the machine, the plungers being constructedand arranged to apply pressure to a shoe positioned on the pad box. Thepad box utilized in such machines, as illustrated in the a patentreferred to,comprises a hollow flexible pad containing a fiuid,abox-like member for confining the pad constructed and arranged to exposeonewall thereof for the reception of a 'sole and shoe, and pressermembers or plungers mounted on the box-like member and arranged to,engage the shoe to apply preliminary pressurethereto prior to-theapplication of afinal or sole-attaching pressure, and to receive thethrust caused by this sole-attaching pressure. The pad box is alsoprovided with means for deforming a wall of the flexible pad to causethe final pressure to be transmitted through the fluid to press the soleforcibly against the shoe bottom, the preliminary pressure. beingmaintained by locking means mounted on the pad box and coacting with theplungers.

The preliminary pressure is applied to the shoe and sole for the purposeof holding them in proper position relatively to each other after theyhave been located on the pad by positioning mechanism fully shown anddescribed in the Ballard patent referred to above. The preliminarypressure, however, notonly prevents the shoe and sole from becomingdisplaced rela-* tively to each other on the pad, but it also de-,

presses or sinks the sole and shoe into the pad, thereby securing abetter contact of the sole with the shoe bottom before the finalpressure is applied. When the final pressure is applied by deforming thelower wall of the pad, the distortion thereof will cause the sole to'bepressed forcibly against the shoe bottom, and will assure a more solidand permanent attachment of the sole to the shoe than could be obtainedif the sole and shoe had not been pressed into the pad before the finalpressure was applied.

Heretofore in machines of this type the preliminary pressure has beenapplied directly by the operator through treadle-operated mechalevers toforce the plungers against the last and shoe, these pressure-applyinglevers being loosely connected to each other by a horizontal rod whichis engaged by a dog adiustably mounted on an intermediate lever. Theintermediate lever is connected to the treadle by a treadle rod and thearrangement of the mechanism is such that the pressure exerted on thehorizontal rod will be distributed between the pressureapplying leversin pressing the shoe against the pad. When the treadle is depressed bythe operator the pressure-applying levers are rotated about their pivotsto force the plungers into engagement with the last and shoe, therebypressing the shoe'and sole firmly against the supporting surface of thepad.

' Itwill be seen from the above that in order to apply preliminarypressure to a shoe in such a manner as to cause the shoe and sole to bepressed into the pad a suitable distance regardless of thesize of theparticular shoe being operated upon, the operator must not only applythe preliminary pressure manually by exerting thenecessary pressure onthe treadle himself, but he must also judge the amount of pressure thathe should exert on the treadle in order to obtain the proper results,since different shoes will require difierentpressures to sink them intothe pad the desired distance. Generally speaking, it has been found thatthe amount of preliminary pressure required to press a shoe and soleinto the pad a predetermined distance prior to the application of thefinal pressure is substantially the same for each unit of bottom area ofthe shoe, irrespective of the size of the shoe operated upon. In otherwords, the amount of preliminary pressure required to press a large shoea given distance into the pad will average substantially the same foreach unit of area of the bottom surface of the shoe as the pressure perunit of bottom area necessary to sink a small shoe approximately thesame distance into the pad. From the above it follows that a large shoe,having a greater sole area than a small shoe, will necessarily require agreater preliminary pressure than the small shoe inyorder to average tilby to insure that both shoes will be pressed into the pad approximatelythe same distance.

Under present conditions considerable labor is involved in applying thispreliminary pressure and, when it is continued for several hours, theoperator becomes fatigued. Moreover, it is not always possible for theoperator to judge accurately the amount of pressure he must exert on thetreadle to produce the proper amount of preliminary pressure for theparticular shoe operated upon, which pressure, as stated, should averagesubstantially the same for each unit of area of the shoe bottom in orderto cause the shoes to be pressed into the pad a uniform distanceirrespective of variation in the size of the shoes.

It is an object of the present invention to provide improvedpower-operated mechanism for applying preliminary pressure to a shoe andsole mounted on a flexible pad, this mechanism being constructed andarranged automatically to vary the pressure substantially in accordancewith the size of the shoe being operated upon so that each shoe will bepressed into the pad approximately the same distance irrespective of itssize.

To the attainment of this object and in accordance with a feature of theinvention novel means is provided in the illustrated machine forutilizing the power of the machine to apply preliminary pressure to ashoe and sole, this means, as illustrated, including a friction clutchcomprising driving and driven elements constructed and arranged toactuate the pressure-applying mechanism in such a manner that when thesole and shoe have been subjected to the proper preliminary pressure forthe size of shoe being operated upon, the clutch elements will slip,thus preventing the application of further pressure to the sole andshoe. The pressure-applying mechanism includes a pair of levers pivotedfor movement toward and away from a shoe on a last and a sole mounted onthe pad, these levers having an adjustable connection with anintermediate lever which. is connected by a rod to a reciprocatory rack,the racl; being actuated, by a pinion secured to the shaft which carriesthe clutch elements. Upon engagement of the driving element of theclutch with the driven element the rack is reciprocated to rotate thepivoted levers into engagement with a pair of shoe engaging devices orplungers to move these plungers into contact with the cone of the lastand the iorepart of the shoe and thus press the sole and shoe forciblyinto the flexible supporting wall or" the pad, this preliminary pressurebeing maintained by the locking means previously referred to.

In accordance with another feature of the invention novel means isprovided for automatically limiting and controlling the preliminarypressure substantially in accordance with the size of the shoe beingoperated upon so that the same average pressure per unit of bottom areawill be applied to each shoe irrespective of its size and thus cause theshoe to be pressed into the pad approximately the same distance whetherit is a large shoe or a small shoe. As illustrated, the friction clutchis actuated by treadle-operated mechanism which applies pressureyieldingly to the clutch elements, these elements being constructed andarranged to operate the pressure-applying mechanism only until theresistance oiiered thereto is equal to the pressure holding the clutchelements in operative relation to each other. In the construction shown,the means for controlling and limiting the preliminary pressure inaccordance with the size of the shoe includes a variable treadle stopwhich limits movement of the treadle in applying pressure to the clutchelements, this treadle stop being automatically positioned by theposition of the top of the last in the shoe which is being operated uponor, in other words, in accordance with the height of such last. Theposition of the top of the last is controlled by two factors, first, bythe height of the last itself, which is determined by the size of theshoe, and, secondly, by the area of the bottom surface of the shoe. Theareas of the bottom surfaces of shoes will diiler in shoes of differentsizes and these areas may also differ in shoes of the same size but ofdifferent styles. For example, the bottom area of a shoe having a broadtoe may be greater than the bottom area of a shoe having a narrow toealthough both shoes may take lasts of substantially the same heights.The shoe having the greater bot tom area, however, will not be sunk sofar into the pad by a given amount of pressure as the shoe with thesmaller bottom area. Consequently, the top of the last in such a shoewill not be lowered as much as the top of the last of the smaller shoeand the treadle stop will not be moved so far, even though the heightsof the lasts in the shoes are substantially the same. Since the treadlestop will be moved less when the larger shoe is on the pad the treadlewill be depressed a greater distance before it contacts with the stop,thereby exerting a greater pressure on the clutch elements. These sameprinciples, namely, that the position of the top of the last in the shoewhich is being operated upon is controlled both by the height of thelast and by the bottom area of the shoe, and that this positionautomatically limits the pressure applied to clutch elements inaccordance with the size of the shoe, will apply, of course, whenoperating on shoes of the same style but of different sizes and whichconsequently require lasts of different heights.

Since the power exerted by the clutch elements to operate thepressure-applying mechanism determines the pressure applied to the soleandshoe, it will be seen that the preliminary pressure applied to eachsole and shoe is automatically determined by the size of the shoe beingoperated upon. The arrangement is such that this pressure will averagesubstantially the same for each unit of area of the shoe bottomirrespective of the size of the shoe. Accordingly, each shoe and solewill be sunk into the pad approximately the same distance before thefinal pressure is applied, thereby insuring that the shoe and sole willbe held in proper position relatively to each other on the pad and willbe sunk far enough into the pad to receive the full benefit of thesole-attaching or final pressure when it is applied.

With the above and other objects and features in view the invention willnow be described with reference to the accompanying drawings and pointedout in the claims.

In the drawings,

Fig. 1 is a side elevation partly in section of a machine forcement-attaching soles to shoes embodying the present invention;

Fig. 2 is a front elevation of the lower portion of the machine shown inFig. 1, with parts broken away and in section;

the pad 20.

Fig. 3 is a vertical section illustrating onan enlarged scale theconstruction of the clutch mechanism and parts associated therewith; and

Fig. 4 is a sectional view of the pad'box with a shoe on the pad,theshoe and table being shownin full with the parts in the positionsthey assume when preliminary pressure is being applied to the shoe. i

The illustrated machine is of the type disclosed in'theabove-mentionedBallard Patent No. 1,897,105,"the present invention beingembodied in mechanism for applying preliminary pressure to a shoe andsole mounted on a-pad box positioned on the table of the machine. Sincethe details of many portions of the ma chine of the Ballard patent areof no conse quence in so far as the present inventionis concerned, acomplete disclosure of that machine is believed to be unnecessary andreference may be had to the patent mentioned for a full disclosure ofsuch parts of the machine as are not illustrated and described herein.

The illustrated machine is provided with a the illustrated machine isprovided with means,

frame comprisingatable l supported by legs 12 and arranged to receive apad box I 4 (Figs. 1 and 2) on which a shoe l6 and a sole l8 (Fig.

4) may be pressed forcibly together and held in such position while thecement, by which the sole is to be attached to the shoe, sets. Themachine is provided with means (not shown) for positioning the shoe andsolefrelatively to each other before the preliminary pressure isapplied, which means is of the character dis-V closed in theBallardpatent mentioned above.

The pad box M, as illustrated in the abovementioned patent, comprises ahollow pad member (Fig. 4) contained in a box-like confining member 22,preferably an aluminum casting,

having at its top a steel plate 24 provided with an opening 26 forexposing the top wall 2f of The opening 26 is shaped to conform to thegeneral outline of the sole of a shoe and is sufficiently large topermit the sole of the largest shoe which is to be operated upon to beplaced on the exposed wall 2! of the pad. An adjustable mask plate 23 isinterposed between the plate 24 and the top wall of the pad at itsforward end to prevent excessive distortion or bulging of the pad whenthe final pressure is applied by the pad, the heel end of the pad beingprovided with a metal plate 25 'vulcanized into the pad for the samepurpose.

'Thepad is filled with fluid, for example, water,

and the box-like confining'member 22 is provided with a door-likebottommember 28 pivoted at 30. The pad box I4 is also provided with aswingingbail or yoke 32 (Fig. 1) having a last-engaging plunger 34 whichmay be brought into position over the heel end of a lasted shoe placed.on the pad 20, and with another bail 36 yokes 36, 32"and-engagingratchet teeth formed in the plungers 38, 34 to prevent upward movementof the plungers except when the pawls are withdrawn. i

In order that the different kinds of pressure referred to herein may notbe confused with each various terms. used. The term to a depending armof the lever 52. clutch-controlling lever 66 is depressed to trip other,it is deemed advisable at this point to explain briefly the meaningsintended by the preliminary pressure as used hereinafter in thedescription and claims is intended to apply to the pressure exerted bythe presser members or plungers which preliminarily press the shoe andsole against the pad, and the term final pressure to the pressureexerted against the shoe and sole by the pad itself through thedistortion of its exposed wall. The term pressure when used alone shouldnotbe'construed as necessarily indicating the total pressure applied tothe shoe and sole, that is, the sum of the preliminary pressure and thefinal or sole-attaching pres-- sure. When theterm pressure isunqualified; for example, by the word preliminary." or the word final,it refers to that one of these two kinds of pressure to which themechanism then.

When 1 under consideration obviously relates. the total pressure isintended the full expression will be used. i

' The preliminary pressure having been applied,

for distorting the exposed wall of .the pad to applyfinal pressure topress the sole forcibly against the shoe bottom, power-operatedmechanism being provided for this purpose of a character fully shown anddescribed in the Ballard patent previouslymentioned and comprisi ing aplunger 40 mounted for reciprocatory movement in the table II] andarranged to engage the door-like member 28 to rock it upwardly andthereby distort the bottom wall of theyieldablepad member 20. Thisdilates the upper wall of the pad causing it to bulge more or lessaround the sole, as shown in Fig. 4, thereby pressing the sole forciblyagainst the shoe bottom. The plunger 40 is forced upwardly by theforward end of a lever 42 (Fig. 1) fulcrumed at 44 beneath the table Illand pivoted at its rear end to a downwardly extending link 46 which, inturn, is pivoted at 48 to the intermediate portion of a forwardlyextending arm 50 42 about its pivot 44 in a clockwise direction, as Jviewed in Fig. l, and thus elevate the plunger 41] to itspressure-applying position, butis prevented from so doing by mechanismwhich controls the action of the weight 58.

a 'The mechanism for controlling the action of the weight 58 comprises amain power'shaft 60 journaled in suitable hearings in the legs 12 of thetable if! and rotated by a motor (not shown) through gearing 62' drivenby a one-revolution clutch 64, the operation of the clutch beingcontrolled by a hand lever 6E5. Fast upon the shaft 60 is an eccentric68 (Fig. 1) which is engaged by and cooperates with a shoe lli pivotedat 12 When the the clutch 64, the shaft 60 is rotated through a singlerevolution in a counter-clockwise direction, as viewed in Fig. 1 so thatthe eccentric 68 will permitthe arm 50 of the bell crank lever 52 tomove downwardly under the influence of the weight 58, thus rocking thelever 42 in a clockwise direction and forcing the plunger 4|] upwardlyagainst the pivoted bottom member 28 of the pad box M. The door-likebottom member 28 is forced upwardly to distort the pad 20 and therebytransmit a final pressure of approximately 60 pounds to the square inchto the shoe bottom. The door-like member 28 is locked in displacedposition by a latch illustrated at I4 (Fig. 4), after which the pad boxmay be removed from the machine and the shoe and sole held underpressure until the cement has set, the latch 14 being operatedautomatically by mechanism described in the Ballard patent mentionedabove.

Turning now to the mechanism embodying the present invention which isutilized, as illustrated herein, for applying preliminary pressure tothe shoe and sole by power, a bracket 16 (Fig. 1) projects upwardly fromthe rear of the table I0 and carries the fulcrum I8 of a pair offorwardly projecting levers 80, 82 provided at their forward ends withfiat surfaces 84, 86 for engagement respectively with the tops of theplungers 34, 38 when the levers 80, 82 are rocked downwardly. Each ofthe levers 60, 82 is provided with a tension spring 88 connected at oneend to the extreme rear end of the lever and at, the other end to thebracket 16 so that the forward ends of the levers are normally heldupwardly away from the positions occupied by the plungers 34, 38 beforepressure is applied to the shoe. Adjustable stops, illustrated as screws98 carried by each of the levers 66, 82, engage projections or lugs 92formed on the upper end of the bracket I6, thereby limiting the upwardmovement of the levers.

The levers 80, 82 are connected about midway of their lengths by a rod94 (Fig. l) theends of which are loosely engaged in circular openingsformed in the levers. An intermediate lever 96, also pivoted on thefulcrum I8 and held upwardly by a spring 89 secured to the bracket 76,extends forwardly between the levers 80, 82, and carries at its forwardend a dog 38 the lower end of which is provided with a semicylindricalrecess or seat for engaging the rod 94. A screw 6|, carried by adownwardly extend arm 95 of the lever 96, engages the bracket 76 tolimit upward movement of the lever under the action of the spring 89.The dog 68 is threaded to receive a relatively coarse screw (not shown)formed on or secured to a shaft I00 journaled in an upstanding portionof the lever 96, and a hand wheel I02 is provided to turn the shaft andadjust the dog 98 to the right or left along the rod 94. The relation ofthe connections between the levers 30, 82 and the intermediate lever 96is in this way varied so that pressure exerted by the lever 96 will bedistributed between the levers 80, 82. A lower arm 9'. of the lever 96is connected to a link I04, the lower end of which is pivotallyconnected to a reciprocatory rack I06 mounted for vertical slidingmovement in ways formed in a casing I08 bolted at H0, H2 and H4 to acasting iII extending between the legs E2 of the frame of the machineand forming a part of the frame. The upper end of the rack I06 isbifurcated to receive the lower end of the link I04 and a pin H6, havingan enlarged portion II 8 extending beyond the rack on one side,completes the connection.

A short horizontal shaft I20, extending forwardly and rearwardly of themachine and journaled in bearings in the casing I68 and in a cover plateI09 fastened to the forward end of the casing by screws I22, has apinion I24 secured thereon near its forward end, the teeth of which meshwith teeth I25 formed on the rack I06 so that when the shaft I20 isrotated in a clockwise direction, as viewed in Fig. 2, the rack will bereciprocated downwardly to lower the levers 60, 82 by means of the linkI04 and connections already described. The casing I08 is bored at I27(Fig. 3) to form an opening to receive the pinion I24, this openingbeing deep enough to permit a limited amount of longitudinal movement ofthe pinion I24 and the shaft I20 to which the pinion is secured. Mountedon the shaft I20, rearwardly of the pinion I24, is a multiple disk,friction clutch I26 running in oil, indicated at I28 in the lowerportion of the casing I88, and comprising a driving element I36 and adriven element I66, the driving element being continuously rotated fromthe motor drive of the machine. The continuously rotated clutch elementI30 is loosely mounted on the shaft I20 and has a worm gear I3I formedon its periphery for engaging a worm I32 formed on a shaft I34 journaledin bearings formed in a top cover I36 of the casing I08, the shaft 134being located above the clutch 26 and at right angles to the shaft I28.The cover I36 is secured to the casing I68 by bolts I38 and hashorizontal bearings formed therein for supporting the shaft I34, thebearing at the right-hand side of the casing, as viewed in Fig. 2, beinglarge enough to receive a bushing I46 which provides the bearing forthat end of the shaft I34. A washer I42 is secured by a screw I44 tothis end of the shaft and a thin plate I46 is interposed between thewasher and the bushing to prevent excessive wear between the movingparts.

Mounted on the other end of the shaft I34, outside the top cover I36, isa gear I48 (Fig. 2) the hub 556 of which is fastened to the shaft bymeans of a taper pin I52. The inner side of the gear I48 bears againstthe cover I36 and, with the washer I42, prevents longitudinal movementof the shaft I34. The gear I48 meshes with a large gear I54 of thegearing 62 through which the motor drive of the machine is effected, theratio between the gears I54 and I48 being such that the gear M8 and wormshaft I34 are rotated considerably faster than the gear I54. The shaft134 is rotated in a clockwise direction, as viewed in Fig. 3, and thetendency of this action is to force the continuously rotated clutchmember I30 forwardly on the shaft I20. A roll I56 is provided to supportthe member I30 against this action of the worm I32. The roll I56 isrotatably mounted on a stud I58 secured in the casing I68 by a set screwI66 and is arranged to contact with the vertical face of the member I30,as shown in Fig. 3.

The continuously rotating clutch member I30 is hollow or cup-like inshape, as shown in Fig. 3, and inside the cupped-out portion is mounteda series of thin clutch plates or rings I60, seven plates being used inthe present instance, which are keyed to the inner horizontal wall ofthe clutch member by keys I62, I64 so that they will rotate with thismember. The driven element I66 of the clutch I26 comprises a hub I68secured to the shaft I20 by a key I10 and abutting against a shoulderI12 formed by an enlarged section I74 of the shaft I20, so thatlongitudinal movement of the shaft inwardly or to the right, as viewedin Fig. 3, will force the clutch member I66 inwardly. The member I66 isprovided with an annular shoulder or ledge I61 which projects inwardlyfrom the main portion of the clutch member, the shoulder being locatedabout midway between the shaft I20 and the er in diameter.

- wardly extending lever 202.

a periphery of the clutch member. On this shoulr der I6? is mountedanotherseries of clutch plates or rings H6, similar to thosekeyed to theclutch member I39 except that the plates H6 are small- The plates I16are arranged to enter the spaces between the plates Hi so that eachseries will have the greater portions of the vertical surfacesof eachplate located only a few thousandthsof an inch away from adjacentsurfacesof the plates of the other series when the clutch is in itsinoperative position, as shown.

in Fig. 3. The continuously rotating clutch member I30, therefore, isfree to rotate Without affecting the clutch member I66 while the partsremain in this position. The'plates I'IE are secured to. the member I66by keys H8 and I8!) so that when they are forced into contact with i theplates itll by longitudinal movement of the -ing forwardly on a gradualupward incline through an opening in the frame III. 'Ihe treadle is heldin inoperative position against a s'top'for'med on the frame by atensionspring I81, theupper end of which is fastenedto the 4 frame by a screw.An inclined opening I88 is provided in the; downwardly curved portion ofthe treadle Hit and a horizontal pin I80, extending transversely throughthe opening I88 below and somewhat in front of the fulcrum I82, formsapivot for one end of a forwardly projecting rod I92, the forward portionof which is reduced. indiameter and passes through a hole in ahorizontal stud 2M! pivotally mounted in ears formedlon the lower end ofa down- The lever 292 is fulcrumed on a pm 204 mounted ona lug 20Eprojecting rearwardly from the upper portion of the frame III. Afairlyheavy compression spring i934 surrounds the reduced portion of therod I92 being held thereonfbya pair of wash: ers I95 and I96. Theforward washer I95 abuts againstan adjusting" nut I91 threaded on theendof the rod and held inradjusted position by a lock nut I98Li Thewasher I 6,WhlCh confines the inner end of the compression spring I94,engages a fiattedsurface formed on the horizontal pin 2M carried by thelever 202. Another flatted surface formed on the opposite side. of thepin 2% abuts against a shoulder formed at the reduced portion of therodIQZ. The spring I94 tends normally to force'the pin Zillland lever2ii2firmly against the shoulder on the rod I92, thus positioning thelever 292 and holding it in position when the machine is at.

rest; The fulcrum 204 of the lever 202 is located in front of and aconsiderable distance above the fulcrum I82 of the treadle lever I85 andthis the treadle before the spring will 2% until the lever can move nofurther, after which the spring I94 compresses to permit furthermovement of thetreadle I36. The tension of the spring I9 may be variedby adjust-.

ing the nuts Nil, 898, thereby varying the amount of pressure which.must be exerted on compress i Adjustably mounted in a circular recess inthe lever 262, at a point directly opposite the center of the forwardendof the shaft W3, is a hardened steel plug 233 (Fig. 3) arranged toengage plug 268 and button 2W forming points of contact between theshaft I and the pivoted lever 202. The plug 2% may be adjusted in therecess and is supported in position against the thrust resulting fromits contact with the'button 2w by an adjustable screw 2I2 threaded inthe lever 202. The screw 2B2 is locked in adjusted position by a lockbushing 2M threaded on the screw and bearing against the lever 2832.,the bushing 2M being provided with a hexagonal head 256 for turning thebushing to lock the screw M2 in position.

Fulcrumed on a pin 2I8 (Fig. 1) carried by a pair of" ears projectingrearwardly from the up per portionof the frame Iii is a substantiallyhorizontal; lever 22%] one arm of which extends rearwardly and has itsinner end extending under andin contact with the projecting portion MSof the pin I116 which connects the rack Iil'fi with the lower end of thelink N24. The upper surface of the inner end of the lever 22$ whichextends under the pin M6 is inclined in such a manner that the leverwill remain in contact with the pin when the parts are below thepositionshown in Figs. 1 and 3. A forward armpf the lever 22% extends through anopening in the frame and has a downwardly extending rod 222 pivotallyconnected to its outer end, the rod passing througha hole formed in aforward portionof the treadle iBE and having a stop nut 224 and a locknut 226 threaded on its lowerend. The; nuts 2%, 226 are adjustable onthe rod 222 and'serve to limit downward movement of the treadle I86..

In the operation of the machine the operator, after positioning a soleand shoe on a pad box with the aid of the positioning mechanismpreviously referred to, depresses the treadle I86 to move the rod I92inwardly. The spring HM, having been tensioned beforehand to exert apredetermined pressure before compressing, will rotate the lever 202inwardly about its pivot 2%, to bring the'plug; 293' into engagementwith the button 2H! onthe end of'the clutch shaft 228. Since the boreHLinjthe casing IE3 is deep enough .topermit a limited longitudinalmovement of the pinion I24, the pressure exerted by the lever 2&2against the end of the shaft 12!! forces the shaft to slidelongitudinally in its bearings. to press the clutch plates are of theclutch member E66; forcibly against the plates I of the continuouslyrotating clutch member I35. A ball bearing 228 is interposed betweenthehub of the member i559 and the inside wall of the casing IE8 to take thethrust of start to the pressure exerted against the clutch members andto permit rotation thereof without excessive friction.

'Upon engagement of the clutch plates I60,

I it the clutchmember 5% is caused to rotate,

therebymotating the shaft M0 to which this member is "keyed. Rotation ofthe shaft its causes the pinion I24, the teeth of which mesh with theteeth I25 of the rack I06, to lower the rack and, through the link I04and the adjustable dog 98 connecting the lever 96 with the rod 04, tocarry the levers 80, 82 downwardly until they engage respectively withthe plungers 34, 38 which are arranged to contact with the cone of thelast and the forepart of the shoe resting on the pad. The dog 98 may beadjusted so that the levers 80, 82 will distribute the pressure in thedesired manner as they force the shoe and sole into the upper surface ofthe pad.

While the levers 80, 82 are being lowered to bring the plungers intoengagement with the last and shoe, the pin H6 is moving downwardly torock the lever 220 about its pivot 2I8. The forwardly projecting arm ofthe lever 22!] is thus elevated to move the rod 222 and the nuts 224,226 upwardly. The stop nuts 224, 226 will continue. to move upwardly aslong as the rack I06 is being moved downwardly through the operation ofthe clutch. In the normal operation of the machine when the treadle I86,which is being depressed by the operator, contacts with the stop nutsfurther downward movement of the treadle is prevented, thus preventingfurther pressure being applied to the clutch elements I30, I66. Theposition to which the stop nuts are raised is dependent upon the size ofthe shoe being operated upon, because the downward movement of thelevers 80, 82, which contact with the top of the last and shoe,determines the downward movement of the rack I06 which elevates the stopnuts. It will be seen, therefore, that the position of the top of thelast controls the position of the stop nuts 224, 226 which limitdepression of the treadle. Consequently, the pressure applied by theclutchoperated mechanism to the shoe and sole is limited by the positionof the stop nuts. This position will vary as the sizes of the shoes varyor, in other words, as the heights of the lasts and bottom areas of theshoes vary. By this arrangement the pressure applied to each shoe andsole will be substantially the same for each unit of area of the shoebottom irrespective of the size of the shoe.

If a condition should arise where a shoe of one style should take a lastwhich is the same height as the last for a shoe of another style, butthe latter shoe should have a bottom area different from the former, themechanism will nevertheless operate to cause substantially the sameamount of pressure to be applied per unit of bottom area to each shoeregardless of the equal heights of the lasts. Under the aboveconditions, the shoe having the greater bottom area will obviouslyrequire more pressure to sink it a given distance into the pad than willbe required to sink the shoe with the smaller bottom area the samedistance into the pad, since the larger shoe will cover a greaterportion of the pad. The larger shoe, however, does not have to be sunkso far into the pad as the smaller shoe in order to produce the sameamount of pressure for each unit of its bottom area. While the levers80, 82 are being moved into contact with the top of the last of thelarger shoe, the rack I06 is descending to raise the stop nuts. Afterthe levers have contacted with the last and shoe and have commenced toapply pressure to the shoe, the rack will continue to descend. Thedistance the larger shoe will sink into the pad under a given amount ofpressure on the treadle, however, will be less than the distance thesmaller shoe will be sunk under the same pressure and, consequently, therack I 06 will not descend as far as it would for the smaller shoe andthe stop nuts will not be elevated as high. This leaves more space forthe treadle to be depressed so that more pressure may be applied to theclutch elements when operating on the larger shoe. When more pressure isapplied by the treadle-operated mechanism to the clutch elements theyactuate the rack I06 and levers 80, 82 to apply greater pressure to thelarger shoe. The arrangement of the mechanism is such that, regardlessof the styles of the shoes or the heights of the lasts in the shoes, thepressure applied will be substantially proportional to the size of theshoe being operated upon.

If the lasts in some instances are not graded exactly proportional tothe sizes of the shoes which are being operated upon, as where differentstyles of shoes have different bottom areas but take lasts of the sameheighths, the position to which the stop nuts are elevated willnevertheless be determined in accordance with the size of the shoe onthe pad since this position is controlled not only by the height of thelast but also by the bottom area of the shoe. When the resistance of theshoe and sole to the pressure of the levers 80, 82 overcomes thepressure being applied by the treadle-operated mechanism to the clutchelements I30, I66, the clutch plates slip, thus preventing furtherdownward movement of the rack 106 and further pressure being applied tothe shoe and sole.

As already pointed out, the pressure exerted on the clutch elements bythe treadle-operated mechanism is applied yieldingly through the actionof the compression spring I94. Accordingly, the tention of this springis what actually determines the pressure applied by the treadle to holdthe clutch plates in driving engagement with each other. The spring I90,therefore, should be tensioned beforehand until it will exert suflicientpressure against the clutch members I30, I66 to cause the desiredpreliminary pressure to be applied to the shoe and sole before thespring I94 starts to compress. The mechanism is so constructed andarranged that the levers 80, 82, will apply a preliminary pressure ofapproximately 20 pounds to the square inch to the shoe bottom before thetreadle contacts with the stop nuts and the clutch plates begin to slip.Since the preliminary pressure per unit of area of the shoe bottom issubstantially the same for all shoes irrespective of their sizes itfollows that the distance which each shoe is sunk into the pad will besubstantially the same, slight allowances being made, of course, for thevariations in the stretch of the rubber at difi'erent portions of thepad when operating on different sized shoes.

If the treadle should be depressed suddenly to its lowermost, positionbefore sufficient time has elapsed to permit the clutch-operatedmechanism to position the stop nuts 224, 226 properly, the mechanism isconstructed and arranged to operate in such a manner that only thedesired pressure will be applied to the shoe and sole. If the treadle isdepressed immediately to its lowermost position against the stop nuts224, 226, the rack I06 will descend as before to lower the levers 80, 82and press the plungers 34, 38 into engagement with the last and shoe. Asthe rack descends it will rock the lever 220 to elevate the rod 222 andstop nuts 224, 226 and, during itsupward movement, the stop nuts willforcibly elevate the treadle until the pressure exerted thereby on theclutch members is reduced sufficiently to cause the claim as new anddesire to secure by Letters Patent of the United States is: l

l. A machine for use in the manufacture of shoes having, in combination,a pad for supporting a shoe'and sole, and power-operated meansfonpressing the shoeand sole together on the pad, said means beingconstructed and arranged automatically to vary'the pressuresubstantially in accordance with the size of the shoe operated 2. A'machine for use in themanufacture of shoes having, in combination, a padfor applying pressure to a shoe and sole, and means for pressing theshoe and sole against the pad, said means being constructed and arrangedautomatically to press each shoe and sole against the pad with a forcewhich varies in proportion to the size of the shoeoperated upon.

1 3. A machine for use in the manufacture of shoes having, incombination, a yieldable pad for supporting a shoe and sole, andpower-operated meansnfor pressing the shoe and sole against said padthereby sinking them into the pad, said means being constructed andarranged automatically to apply a pressure which will sink every shoeand sole operated upon sub stantially the same distance into the padirrespective of the sizes of the shoes.

l/Anmachihe for use in the manufacture of shoes having, in combination,a flexible pad for supporting a shoe and sole, and power-operated meansfor pressingthe shoe and sole against a surface of said pad, said meansbeing constructed and arranged automatically to vary the pres sureappliedto shoes of different sizes so. that substantially the samepressure per unit of bottom area will be applied toeach shoe, therebysinkingeach sole and shoe a uniform distance into the pad.

.5.-A, machine for use in the manufacture of shoeshaving, incombination, a flexible pad for supporting a shoe and sole, andpower-operated means for preliminarily pressing theshoe and sole againstthe supporting surface ofthe pad, said means being constructed andarranged automatically to limit the preliminary pressure in accordancewith the size of the shoe being operated upon, thereby applyingsubstantially the same preliminary pressure to a large shoe inproportion to itsbottom area as is applied to a small shoe in proportionto its bottom area.

--6.A machine for use in the manufacture of shoes having, incombination, a pad for supporting a shoe on a last and a sole, and meansfor applying pressure to the shoe and sole supportedon said pad, saidmeans being constructed and, arranged to apply pressure to each shoe andsole which is automatically limited by the heightwise position of thetopof the last in th shoe being operated upon. l

'7. A machine for use in the manufacture of shoes having, incombination, a pad for supporting a shoe and a sole, and power-operatedmeans for applying preliminary pressure to the shoe and sole, said meansbeing constructed and arranged automatically toapply substantially thesame preliminary pressure per unit ofbottom area to each shoe operatedupon irrespective of the size of the shoe.

' 8. A machine for use in the manufacture of shoes having, incombination, a pad for supporting a shoe and sole, power-operated meansfor applying preliminary pressure to the shoe and sole, said means beingconstructed and arranged automatically to vary the pressure applied. todifferent sized shoes substantially in accordance with the size of theshoe operated upon, and means for applying final pressure to the soleand shoe.

9. A machine for use in the manufacture of shoes having, in combination,a flexible'pad for receiving a shoe and sole, power-operated means forpreliminarily pressing the shoe and sole against a wall of said pad,said means being constructed and arranged automatically to apply to eachshoe operated upon. preliminary pressure which is substantially the samefor each unit of area of the shoe bottom irrespective of the size of theshoe, and meansfor distorting another wall of said pad to apply finalpressure to the shoe and sole.

10. A machine for use in the manufacture of shoes having, incombination, a pad arranged to receive a shoe and sole, power-operatedmeans for engaging the shoe to apply pressure thereto, and meansconstructed and arranged, upon engagement of said power-operated meanswith the shoe, automatically to limit the pressure applied to the shoeby said power-operated means.

11. A machine for usein the manufacture of shoes having; in combination,a yieldable pad arranged to receive a shoe and a sole, poweroperatedmeans for pressing the shoe and sole into said pad, and means movableautomatically to cause said power-operated means to vary the pressureapplied to the shoe substantially in accordance to the size of saidshoe, thereby pressing the shoe and sole the required distance into thepad.

12. A machine for use in the manufacture of shoes having, incombination, a pad arranged to receive a shoe on a last and a sole,means for pressing the shoe and sole against the pad, and poweroperatedmeans for actuating said press ing means, said power-operated meansbeing constructed and arranged automatically to cause said pressingmeans to exert a pressure on each shoe which is determined by the heightof the last in said shoe.

13. A machine for use in the manufacture of shoes having, incombination, a yieldable pad arranged to receive a shoe on a last and asole which is to be attached to said shoe, means for applying pressureto the shoe and sole, said means being movable into and out of engage:ment with the shoe and last mounted on said pad, and power-operatedmeans for moving said pressure-applying means into engagement with thelast and shoe and by the extent of movement of said pressure-applyingmeans automatically determining the pressure which is applied to theshoe and sole.

i l. A machine for use in the manufacture of shoes having, incombination, a flexible pad for supporting a shoe and sole,power-operated means for pressing the shoe and sole against said pad,said means being constructed and arranged automatically to vary thepressure substantially in accordance with the size of the shoe, therebysinking the sole and shoe a suitable distance into the pad, and meansfor applying final pressure to the sole and shoe.

15. A machine for use in the manufacture of shoes having, incombination, a flexible pad for supporting a shoe on a last and a sole,poweroperated means for preliminarily pressing the shoe and sole againstthe pad, said means being constructed and arranged automatically to varythe pressure substantially in accordance with the size of the shoe beingoperated upon, thereby applying substantially the same pressure per unitof bottom area to each shoe irrespective of its size and sinking eachshoe and sole approximately the same distance into the pad, and meansfor applying a final pressure to the sole and shoe while held in suchposition.

16. A machine for use in the manufacture of shoes having, incombination, a yieldable pad for receiving a shoe on a last and a sole,means for applying pressure to the shoe and sole, and power-operatedmechanism for actuating said pressure applying means, said mechanismbeing constructed and arranged first to move the pressure applying meansinto engagement with the last and shoe and thereafter to cause saidmeans to apply pressure to the shoe and sole the amount of which isautomatically determined by the height of the last engaged by said pressure applying means and by movement of the last in response to thepressure applying action.

1'7. A machine for use in the manufacture of shoes having, incombination, a yieldable pad for supporting a shoe on a last and a sole,9. pair of levers for engaging the shoe and last to cause pressure to beapplied to the shoe and sole, power-operated means including a frictionclutch for actuating said levers, treadle-operated means for holdingthe, clutch in driving engagement, and means automatically set inaccordance with the size of the shoe to limit movement of saidtreadle-operated means to permit the clutch to be held in drivingengagement with a force which will cause greater pressure to be appliedto a large shoe than to a small shoe.

18. A machine for use in the manufacture of shoes having, incombination, a yieldable pad for supporting a sole and a shoe to whichthe sole is to be attached, a lever for pressing the sole and shoeagainst the pad, a friction clutch for actuating said lever, and meansincluding intermediate connections between the lever and the clutchwhereby the former is caused to press the sole and shoe against the padwith a pressure which is substantially the same for each ufit of area ofthe shoe bottom irrespective of the size of the shoe operated upon.

19. A machine for use in the manufacture of shoes having, incombination, a yieldable pad arranged to receive a shoe on a last and asole, power-operated means for applying pressure to the sole and shoe,said means comprising a pair of levers, a friction clutch, andconnections between the levers and the clutch whereby the latteractuates the levers to apply pressure to the sole and shoe, means forsetting the clutch to actuate said levers, and means for automaticallylimiting the pressure applied to set the clutch in accordance with theheight of the last in the shoe.

20. A machine for use in the manufacture of shoes having, incombination, a yieldable pad arranged to support a shoe and a sole, aplurality of levers for applying pressure to the shoe and sole supportedon said pad, a friction clutch comprising a driving element and a drivenelement for actuating said pressure applying levers, and treadleoperated means for pressing the clutch elements yieldingly into drivingengagement, said means being constructed and arranged gradually toincrease the force exerted on the clutch elements until the desiredpressure is applied to the shoe and sole after which the clutch elementswill slip.

21. A machine for use in the manufacture of shoes having, incombination, a yieldable pad arranged to receive a shoe and sole, a pairof levers for applying pressure to the shoe and sole,

a friction clutch including a driving element and a driven element foractuating said levers, said clutch being constructed and arranged toactuate said levers until the desired pressure is attained, after whichthe clutch elements will slip, treadle-operated means for applyingpressure to set the clutch, and means for automatically limiting thepressure applied to set the clutch so that it will cause the pressureapplying levers to apply only the desired pressure to the shoe and solebefore the clutch elements begin to slip.

22. A machine for use in the manufacture of shoes having, incombination, a yieldable pad constructed and arranged to receive a shoeand a sole, a pair of levers for applying pressure to the shoe and sole,a friction clutch for actuating said levers, said clutch comprising adriving element and a driven element which are held in frictionalengagement until the pressure on the shoe and sole overcomes the forceof the clutch elements after which the elements will slip,treadle-controlled means for forcing the clutch elements into saidfrictional engagement, and means for limiting the pressure which may beapplied to said treadlecontrolled means to hold the clutch elements insuch engagement, said limiting means being controlled automatically bythe size of the shoe operated upon, thereby limiting the pressureapplied to the shoe and sole in accordance with the size of the shoe.

23. A machine for use in the manufacture of shoes having, incombination, a yieldable pad constructed and arranged to receive a shoeon a last and a sole, a pair of levers for applying initial pressure tothe shoe and sole, poweroperated means including a friction clutch foractuating said levers, treadle-controlled means for applying pressure toset the clutch, said clutch being constructed and arranged to actuatesaid levers until the resistance of the shoe and sole to the pressureapplied thereto overcomes the pressure holding the clutch set, afterwhich the clutch will slip and cease to apply additional pressure, meansfor automatically limiting the pressure applied to the clutchsubstantially in accordance with the position of the top of the last inthe shoe, thereby varying the pressure applied to shoes of differentsizes substantially in accordance with the size of the shoe beingoperated upon, and means for applying final pressure to the shoe andsole.

24. A machine for use in the manufacture of shoes having, incombination, a yieldable pad arranged to receive a ishoe and a sole, apair .of levers for applying preliminary pressure to the shoe and sole,a friction clutch for actuating said levers, said clutch beingconstructed.

and arranged to actuate said levers until the resistance of the shoe andsole to the pressure of the levers overcomes the friction of the clutchafter which the clutch will slip, and treadleoperated means for applyingpressure to the clutch to actuate said pressure applying levers,

said means being constructed and arranged automatically to limit thepressure applied to the clutch in accordance with the size of the .shoebeing operated upon, thereby causing said pressure applying levers toapply substantially the same amount of preliminary pressure per unit ofbottom area to a large shoe as to a small shoe.

25. A machine for use in the manufacture of shoeshaving, in combination,a yieldable pad constructed and arranged to receive a shoe and fa sole,means for applying pressure to the shoe and sole, a friction clutchincluding a driving element and a driven element for actuating saidpressure applying means, said clutch elements being constructed andarranged to remainin operative engagement with each other until theresistance of the shoe and sole to the pressure 'of the power-operatedmeans overcomes the 'force holding the clutch elements in operative'engagement, after which the elements will slip,

'treadle-operated means for forcing the clutch elements into operativeengagement, and means for limiting the pressure which may be applied tohold the clutch elements in such engagement,

said means including a variable stop the position of which isautomatically determinedby 'the height of the last in the shoe beingoperated upon. 7 l r 26 A machine for use in the manufacture of shoeshaving, in combination, a yieldable pad for supporting a shoe and asole, a rotatable shaft, a friction clutch mounted on said shaft,pressure applying means actuated by said clutch, said clutch beingconstructed and arranged to be setby longitudinal movement of said shaftand to remain set until sufficient resistance is offered to the pressureapplying means to overcome the pressure holding the clutch set, meansfor moving the shaft longitudinally to set the clutch, and means forvarying the pressure by which the shaft is so moved, said means beingcontrolled automatically in accordance with the size of the'shoeoperated upon. 7

27. ,A machine for use in the manufacture of shoes having, incombination, a yieldable pad for supporting a shoe and a sole, arotatable shaft, a friction clutch having driving and drivenelementsmounted on saidshaft, levers a friction clutchfor actuating saidpressure- -applying levers, saidclutch being, constructed 0 operated bysaid clutch and movable toward and away from the pad for applyingpressure to the sole and shoe supported on said pad, manually operatedmeans for relatively moving said clutch elements to cause operation ofthe pres- 5 sure-applying levers, and means actuated by movement of thepressure-applying levers toward the pad for offsetting the force appliedto the clutch and thereby limiting the driving power of the drivenelement of said clutch,

28. A machine for use in the manufacture of shoes having, incombination, a yieldable pad for supporting a shoe and a sole, arotatable shaft, a friction clutch mounted on said shaft,pressure-applying means operated by said clutch 75 and constructed andarranged to apply pressure to the sole and shoe, said clutch comprisingdriving and driven elements, the driven element operating saidpressure-applying means after the clutch is set and continuing tooperate said means until sufiicient resistance is exerted by the shoeand sole to offset the force holding the clutch elements; in drivingengagement, and manually-operated means for effecting relative movementof the clutch elements to set the clutch, said means being adjustable tovary the pressure exerted on the clutch elements, thereby to vary thepressure applied to the shoe and sole.

29. A machine for use in the manufacture of shoes having, incombination, a yieldable pad. for supporting a shoe on a last and asole, a rotatable shaft, driving and driven clutch elements mounted onsaid shaft, means operated by said clutch elements for applying pressureto the shoe and sole, said clutch elements being constructed andarranged to cause the pressure-applying means to apply pressure to theshoe and sole after the driven element has been moved into engagementwith the driving element by longitudinal movement of the rotatable shafton which the elements are mounted and to cause said means to increasethe pressure until sufficient resistance is offered by the shoe and soleto offset the force holding the clutch elements in driving engagementafter which the elements will slip, treadle-operated means for exertingpressure yieldingly on said shaft to efiect longitudinal movementthereof and force the clutch elements into driving engagement, and meansfor automatically limiting the operation of said treadle-operated meanssubstantially in accordance with the height of the last in the shoebeing operated upon.

30. A machine for use in the manufacture of shoes having, incombination, a yieldable pad arranged to receive a shoe and a sole,means .for applyingpressure to the shoe and sole, a

frictionclutch for operating said pressure-applying means, said clutchbeing constructed and arranged-to be set by pressure and to cause apressure to be applied to each shoe and sole which is proportional tothe pressure applied to set the clutch, treadle-controlled means forsetting the clutch, and means for automatically limiting the action ofsaid treadle-controlled means substantially in accordance with the sizeof the shoe being operated upon so that the pressure applied to the shoeand sole will be substantially proportional to the size of said shoe.

31. A machine for use in the manufacture of 1 shoes having, incombination, a yieldable pad to receive a shoe on a last and a sole, apair of levers for applying pressure to the shoev and sole,

means for setting the clutch, and means for automatically limiting themovement of said treadle-contrclled means substantially in accordancewith the height of the last in the shoe being operated upon, so that thepressure exerted against the clutch will be determined by I andpower-operated means means 'being also arranged automatically to returnthe treadle forcibly to a predetermined po sition if it should he forcedbeyond this position before the limiting means is operated, "therebyassuring that the pressure applied to the shoe and sole will :be limitedsubstantially in :accordance with the size of the shoe, irrespective ofthe manner in which the treadle is operated.

'32. A machine for use in the manufacture of shoes having, incombination, a yieldable pad arranged to receive a shoe and a sole,levers for applying pressure to the shoe and sole, power- :operatedmeans for actuating said levers, said means comprising a rotatableshaft, a clutch for rotating said shaft, a pinion mounted on saidshaftfa reciprocatory rack meshing with said ":pinion, and .a'link'connecting said rack with the pressure-applying levers,treadle-controlled -mea'ns for applying pressure to said power-operatedmeans, and means for limiting the pressure applied by saidtreadle-controlled means, said limiting means being operatedautomatically by movement of the rack during the pressureapplyingoperation.

33. .A machine for use in the manufacture of shoes having, incombination, a hollow vessel containing fluid and arranged to receive ashoe and sole, power-operated means for applying preliminary pressure tothe shoe and sole, and means for thereafter applying final pressure tothe shoe and sole, said power-operated means being constructedrandarranged to operate automatically in such a manner that the pressureapplied to the shoe and sole will be substantiallythe same for each unitof area of the shoe bottom irrespective of the size of the shoe.

34. A machine for use in the manufacture of shoes having, incombination, a hollow vessel containing fluid and arranged to receive ashoe and .a sole, power-operated means for applying preliminary pressureto the shoe and sole, for applying final pressure to the shoe and sole,said firstnamed means being constructed and arranged automatically tocontrol the pressure substantially in accordance with the bottom area ofthe shoe operated .upon, thereby applying a preliminary pressure whichis greater for a large shoe than .for a small shoe by an amountsubstantially proportional to the difference in size betweenthelargeshoe and the small shoe.

35. A machine for use inthe manufacture of shoes having, in combination,a hollow vessel containing fluid and arranged to receive a shoe and asole, means for applying preliminary pressure to the shoe and sole, saidmeans being operated by power transmitted through a clutch toisaidpressure applying means, means for actuating the clutch in such a mannerthat the pressure applying means will be caused automatically to apply apreliminary pressure which averages substantially the'same for each unitof area of the shoe bottom irrespective of the size of the shoe operatedupon, and power-operated means for applying final pressure to the shoeand sole.

36. A machine for use in the manufacture of shoes having, incombination, a pad for supportmeans for :applying pressure 'to the shoeand sole, a friction clutch rmactuating said 1poweroperated means, saidclutch being constructed and arranged to cause said power-operated meansto operate until the pressure on the shoe and sole reaches an amountwhich is determined by the height of the last in said shoe after whichthe clutch will slip, and means for maintaining said pressure.

38. A machine for use in the manufacture of shoes having, incombination, a 'yieldable pad for supporting a shoe and a sole,power-operated means for applying preliminary pressure to the shoe andsole, a friction clutch for causing said power-operated means .to applyincreasing pressure until the sole and shoe have been pressed into thepad the required distance, and

spring-pressed paWls for automatically maintaining the preliminarypressure thus applied.

39. A machine for use in the manufacture of shoes having, incombination, a pad for supporting a shoe and a sole, a pair of leversfor applying preliminary pressure to the shoe and sole, a frictionclutch comprising driving and driven elements for actuating saidpressure applying levers, said clutch being constructed and arranged tocause said levers to exert a prelimtionately with the pressure appliedto said clutch elements, means for automatically maintaining thepreliminary pressure applied by said levers, and means for applyingfinal pressure to the shoe and sole.

WILLIAM D. THOMAS.

